This has just been posted on PlugInUpdate site..
We’re sorry to announce that the PluginUpdate Store project has been cancelled due to lack of interest. We had thought that it would be a great way to tie PluginUpdate together as a complete solution, and obviously a very transparent and unobtrusive way to fund the project, however, it turns out it was a complete miscalculation. Very sorry for any confusion or inconvenience this may have caused (although it doesn’t seem that anyone will mind much.) The good news is, further development of PluginUpdate continues, totally unaffected by this revelation. We’re committed to keeping PluginUpdate free and incredibly useful.
This is a real shame as it would have given us a one stop shop for plug-ins but it is not to be. However it is good news that the PlugInUpdate project isn’t dead.